--
--  Copyright 2022 The Open Islands Authors. All Rights Reserved.
--
--  Licensed under the Apache License, Version 2.0 (the "License");
--  you may not use this file except in compliance with the License.
--  You may obtain a copy of the License at
--
--      http://www.apache.org/licenses/LICENSE-2.0
--
--  Unless required by applicable law or agreed to in writing, software
--  distributed under the License is distributed on an "AS IS" BASIS,
--  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
--  See the License for the specific language governing permissions and
--  limitations under the License.
--
local _M = {
    _VERSION = '0.1'
}

local ngx = ngx
local debug = debug
local string = string
local tostring = tostring
local table = table


local errlog = require "ngx.errlog"


function _M.debug(...)
    _M.logger(ngx.DEBUG, ...)
end

function _M.info(...)
    _M.logger(ngx.INFO, ...)
end

function _M.error(...)
    _M.logger(ngx.ERR, ...)
end

function _M.warning(...)
    _M.logger(ngx.WARN, ...)
end

function _M.logger(level, ...)
    local n = select("#", ...)
    local t = { ... }
    local info = debug.getinfo(3, "Sl")
    local prefix = string.format("%s:%d:", info.short_src, info.currentline)
    local buf = { prefix }
    for i = 1, n do
        buf[i + 1] = tostring(t[i])
    end
    local msg = table.concat(buf, " ")
    errlog.raw_log(level, msg)
end

return _M

